Car rental created with related drop down menus. Submenu depends on parent menu selection

Created using some of the provided templates

Hi guys, I'm desperate for help. My wireframe is done and everything is programmed in proto but screen map isnt working and I dont know what I'm doing wrong. Please can anyone help me look at this? Thanks so much, Luke

Design Credits: https://www.sketchappsources.com/free-source/4675-marier-shopping-ui-kit-ebizmirli-sketch-freebie-resource.html